Rocks near the surface deform mostly as brittle. T or F
True
Beds always dip in the direction of younger beds. T or F
True
Faults are clearly an example of brittle strain. T or F
True
Folds and thrust faults are caused by tension in the earths crust. T or F
False
Most sedimentary rocks were originally deposited as flat-lying beds. T or F
True
The difference in the arrival time of the P and S wave is related to-
A. the distance to the earthquake from the seismic station
Which one of the following is consistent with deformation by folding?
C. the crust is shortened perpendicular to the fold axis
A ___ is a prominent ridge formed by different erosion of a resistant layer of dopping strata.
C. hogback
A ____ is a flat topped hill that is usually an indication of flat lying strata.
C. mesa
A sea large wave created by an earthquake is properly called a -
C. tsunami
If a deformed body recovers its original shape as stress is released, it is said to be -
A. elastic
Which of the hollowing would NOT be characteristic of an anticline:
A. horizontal limbs
A structural basin is simply a circular:
A. syncline
The block of material overlying an inclined fault plane is the:
C. hanging wall
If the hanging wall has moved down, the fault is -
D. normal
A bed that dips due east, must strike:
C. north-south
If the surface exposures (map view) of folded beds resemble Avas or horseshoes, then the folds must be:
D. plunging
The San Andreas Fault system can be described as -
E. strike-slip
Geologic structures (faults and folds) are important in oil and gas exploration because -
A. structures can trap oil and gas
A ___ is a fracture in bedrock along with movement has taken place
D. fault
In an overturned fold, the limbs dip -
A. in the same direction
If the fault dips toward the up-thrown block, the fault is-
B. reverse
If a sequence of beds gets younger toward the east, then they must be dipping to the-
D. east
We know what the mantle is made of because-
C. samples of the shallow mantle are brought up in some volcanoes
Show me the Rift Valley of East Africa, and I'll show you a-
D. diverging plate boundary
The Himalayan Mountains formed by-
C. continent-continent convergence
The Red Sea is interpreted as-
A. a flooded rift valley
Most of the world's largest mountain belts were formed in response to-
C. compressional stress
The Basin and Range Province of the western US are characterized by a large number of-
D. fault block mountains
A fold that exposes beds that dip in toward the center of the fold is a-
A. syncline
The low-standing plains between horst-blocks are-
C. graben
According to the concept of ___, "floating" mountains adjust their elevation in response to the erosion by upward buoyancy as surface material is removed.
A. isostasy
The Alps, Himalayas, and Appalachains-
A. are folded mountains
The compass direction formed by the intersection of a dipping surface and a horizontal place is the-
B. strike
Fractures in rock without movement along the fractures are called-
B. joints
Source materials for the sedimentary rocks in the Appalachian Mountains was located to the ____ of the present day mountains.
A. east
The Coast Ranges of Washington, Oregon, and northern California are formed by-
D. volcanoes
The Andres Mountains of South America are an example of mountains formed by-
B. ocean-continental convergence
The Basin and Range topography of western US is related to-
C. stretching the crust
The stable interior of the continent is known as its-
B. craton
The Texas Hill Country and the Ozark Mountains are examples of mountain or hilly terrain formed by-
A. dissection by stream erosion
The core of the Sierra Nevada Mountains and Smoky Mountains exposes-
A. igneous rock
The North American continent has grown progressively-
C. larger by continental accretion
The term Aorogeny refers to-
A. mountain building
The oldest rocks in North America can be found in-
